Metallic structure.



M. 5; L. S. LAGHMAN,

` METALLIC STRUCTURE.

APPLIUKATION FILED MAR. 11, 1909.

966,756. Patented Aug. 9, 1910.

F IG. 1

i To all whomit may UNITED sTATEs PATENT OFFICE.

`HAUBICE LAGHMAN `AND LAURENCE S.. LACHHAN, 01:" NEW YORK, N. Y.

. METALLIC STRUCTURE.

' Specilcation of Letters Patent.

Patented Aug. 9, 1910.

concern:

Be it known that we, MAURICE LACHMAN and LAURENCE S. LACHVMAN residentsV of New York, in the county of New York and StateA of New York, have invented a new and useful Improvement in Metallic Structures; and we' do hereby declare the follow ing to be a full,clear, and exact description thereof.

Our invention relates to a metallic Yframe work or structure of a 'skeleton or open work character ada ted for use as fencing, gates, grilles, and other devices towhich it may be ound a plicable.

The o ]ect of our invention is to rovide a construction of this character w ich is very rigid' and durable and inwhich the arts composing .the same cannot work loose, ut are firmly united together to foi-rnl an integral structure.

To these ends our invention comprises the novel features hereinafter set forth.

In the accompanying drawing Figure 1 is an elevation o a portion of our improved structure, the same being illustrated in the form of aufence; Fig. 2is a plan view; Fig. f

3 is an enlarged plan view showin the crosspieces in section; and Fi 4 an 5 are sections on the lines 4-4 an 5 5, respectively, t Fi 2,1ookingin the direction of the arrow. n the-drawing the numeralQ designates longitudinal stri s of metal which may be of an suitable imensions, said strips having the longitudinal ribs 3 thereon which may be formed by rolling or otherwise. The cross-pieces or pickets 4, in thecase of a fence, are provided with the ribs 5 extending alon their outer edges and said crossieces are eld between the several pairs o .rails or strips 3, as clearly indicated in Flgs. 2 and 3.. The strips 3 and cross-pieces 4 are Vwelded together so as to form an integral structure and. thisvwelding may be conveniently effected by electricity. Any suitablev electric weldingV machine may be em oyed for this purpose, and the ridges 3 an 5 on the strips and cross-pieces will form the proper protuberances t. or projections for creatin the necessa resistance when said projections are broug t into contact and the current 'is applied so that these ridges will become heate up to a welding point, and

`when a slight pressure is applied the stri s being welded together there is absolute y noA posslbility of any separation between the rails and the pickets and the life of the fence is extended indeiinitely.

It is apparent that the structure may be formed in many diiferent designs, whether for fencing or other purposes, and we do not in an way wish to limit ourselves to the speci c construction illustrated and described. It is impossible forus to enulnerl ate the uses to which a structure may be applied, but we desirelt'o include within the scope of `our invention any uses for the invention which may develop in the future.

What we claim is:

A metallic frame work vor structure comprisinl longitudinally extending strips having ri s or ridges at their edges and cross` pieces uniting said strips having vertical.

ribs or ridges attheir edges, said cross-pieces being held between pairs of said strips the ribs onsaid stri s being electrically welded to the ribs on sa1d cross pieces.

In testimony whereof, we the said MAURICE LACHMAN and LAURENCE S. LACHMAN have hereunto set our hands.

MAURICE` LACHMAN. LAURENCE S. LACHMAN. lll'itnesses:

REGINALD HAWLEY, J. W. CORRIGAN. 

